What is the oxidation number of tin (sn) in the compound na2sno2? a. -2 b. 0 c. +2 d. +3

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car

Why is the bottom layer of a trophic pyrimid the

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c